A very RICH and showy silver ore specimen from Guanajuato, Mexico. Moderately crystallized acanthite is liberally covered with nicely contrasting calcite rosettes, pastel-pink dolomite and tiny, sparkly chalcopyrite crystals. All in all, an excellent combination piece from the La Sirena Mine, which is adjacent to and on the same vein as the very famous Rayas Mine. Very little damage, overall. Ex. George Elling Collection.